基桩嵌岩段承载特性试验研究

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摘要 The characteristics of pile-rock structure interface considerably influence the load transmission process of the rock-socketed segment of pile. The expressions for pile side friction are established based on the mechanism of sliding dilatancy. An analytical solution for the friction and axial force of the rock-socketed segment are obtained when the surrounding rock is under the conditions of the sliding dilatancy stage. Then, the distribution of friction resistance and axial force along the rock-socketed segment are discussed based on the obtained analytical solution and the pile tip load sharing ratio. The load transfer process of the rock-socketed segment of pile is analyzed by conducting a field test on a large-diameter rock-socketed pile. The side friction characteristics in soil and rock are expounded. The calculation parameters are obtained inversely by combining with the theoretical formula. Theoretical calculation result exhibits good agreement with measured data.

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	雷勇
	尹君凡
	陈秋南
	刘一新

关键词 ： bridge engineering, bearing behavior, experimental study, rock-socketed segment, load sharing ratio

Abstract：The characteristics of pile-rock structure interface considerably influence the load transmission process of the rock-socketed segment of pile. The expressions for pile side friction are established based on the mechanism of sliding dilatancy. An analytical solution for the friction and axial force of the rock-socketed segment are obtained when the surrounding rock is under the conditions of the sliding dilatancy stage. Then, the distribution of friction resistance and axial force along the rock-socketed segment are discussed based on the obtained analytical solution and the pile tip load sharing ratio. The load transfer process of the rock-socketed segment of pile is analyzed by conducting a field test on a large-diameter rock-socketed pile. The side friction characteristics in soil and rock are expounded. The calculation parameters are obtained inversely by combining with the theoretical formula. Theoretical calculation result exhibits good agreement with measured data.

Key words： bridge engineering bearing behavior experimental study rock-socketed segment load sharing ratio

收稿日期: 2017-07-28

基金资助:Supported by the National Natural Science Foundation of China (51208195); Open Engineering Fund for Key Laboratory of Stability Control and Health Monitoring of Geotechnical Engineering (E21618)

通讯作者: LEI Yong E-mail: leiyonghnu@163.com

引用本文:

雷勇, 尹君凡, 陈秋南, 刘一新. 基桩嵌岩段承载特性试验研究[J]. Journal of Highway and Transportation Research and Development, 2017, 11(3): 54-61.
LEI Yong, YIN Jun-fan, CHEN Qiu-nan, LIU Yi-xin. Experimental Study on the Rock-Socketed Segment of Pile and Analysis of Its Load-Bearing Characteristics. Journal of Highway and Transportation Research and Development, 2017, 11(3): 54-61.

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